（     ）1、It's 6 o'clock. It's time to_____.      A. breakfast  B. lunch    C. dinner

  （     ）2、It's cold and _____ _____Kunming.  A. snow/in  B. snowy/in  C. snows/ on

  （     ）3、I'm late _____ school.             A. for      B. to        C. at

  （     ）4、Welcome _____our school.         A. on      B. for       C. to

  （     ）5、Is that a _____office?             A. teacher   B. teachers   C. teachers'